US4786076A - Steering column fastening arrangement for a motor vehicle - Google Patents

Steering column fastening arrangement for a motor vehicle Download PDF

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Publication number
US4786076A
US4786076A US07/049,468 US4946887A US4786076A US 4786076 A US4786076 A US 4786076A US 4946887 A US4946887 A US 4946887A US 4786076 A US4786076 A US 4786076A
Authority
US
United States
Prior art keywords
steering
deformation
shaped member
fastening arrangement
steering column
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US07/049,468
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English (en)
Inventor
Franz-Rudolf Wierschem
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dr Ing HCF Porsche AG
Original Assignee
Dr Ing HCF Porsche AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dr Ing HCF Porsche AG filed Critical Dr Ing HCF Porsche AG
Assigned to DR. ING. H.C.F. PORSCHE AKTIENGESELLSCHAFT, STUTTGART, GERMANY reassignment DR. ING. H.C.F. PORSCHE AKTIENGESELLSCHAFT, STUTTGART, GERMANY ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: WIERSCHEM, FRANZ-RUDOLF
Application granted granted Critical
Publication of US4786076A publication Critical patent/US4786076A/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D1/00—Steering controls, i.e. means for initiating a change of direction of the vehicle
    • B62D1/02—Steering controls, i.e. means for initiating a change of direction of the vehicle vehicle-mounted
    • B62D1/16—Steering columns
    • B62D1/18—Steering columns yieldable or adjustable, e.g. tiltable
    • B62D1/19—Steering columns yieldable or adjustable, e.g. tiltable incorporating energy-absorbing arrangements, e.g. by being yieldable or collapsible
    • B62D1/195—Yieldable supports for the steering column

Definitions

  • the present invention relates to a steering column fastening arrangement for a motor vehicle with an energy-absorbing deformation element which is arranged between a steering bracket retained on the side of the body and a tubular protective steering member.
  • a steering column fastening arrangement is disclosed already in the DE-OS No. 28 14 145 which includes an arrangement for the energy absorption in case of collisions by way of a deformation element.
  • This deformation element is connected with the steering column and includes zigzag-shaped deformation sections.
  • a plastic deformation of the element takes place in case of an impact by way of a retaining member on the side of the body which cooperates with the deformation element by means of a bolt.
  • this prior art arrangement consists of a large number of individual components which are costly to install and which does not assure a safe mounting of the steering column at the vehicle body by way of these elements.
  • the deformation element consists of a plate rigidly connected with a U-shaped member of the tubular protective steering member, which includes slot-like deformation sections that are arranged corresponding to elongated apertures of the U-shaped member, in which are guided displacement bolts extending through the deformation sections that retain the tubular protective steering member at the steering bracket fixed at the body.
  • the same only needs to be constructed as deformation member whereby the plate-shaped construction thereof offers the advantage of a small structural space.
  • the deformation member is formed of few parts which are assembled on the outside and can then be installed in the vehicle in a simple manner.
  • this element can absorb a sufficient deformation path without significant stress concentration and the element will effect a step-wise progressive energy absorption as a result of a collision.
  • FIG. 1 is a side elevational view, partly in cross section, of a steering arrangement with a deformation element in accordance with the present invention
  • FIG. 2 is a cross-sectional view, on an enlarged scale, through the plate-like deformation element in accordance with the present invention, connected with a U-shaped member;
  • FIG. 3 is an elevational view in the direction of arrow Z of FIG. 2;
  • FIG. 4 is a plan view on FIG. 2;
  • FIG. 5 is a cross-sectional view, on an enlarged scale, of the displacement bolt with cup spring in accordance with the present invention.
  • FIG. 6 is a perspective view of a plastically deformed plate of the element after a collision
  • the steering arrangement illustrated in FIG. 1 includes a steering shaft 1 which is connected at its upper end with a steering wheel 2 and at its lower end with a steering gear (not shown) and which is rotatable within a tubular protective steering member 3.
  • the steering shaft 1 is retained in the longitudinal direction relative to a displaceable part 4.
  • the fastening of the steering arrangement at the vehicle body 5 takes place by way of a U-shaped member 6 connected with the tubular protective steering member 3, whereby the member 6 is retained at a steering bracket 8 by means of displacement bolts 7, 7a.
  • the member 6 consists of a U-shaped profile whose legs 9 and 10 are rigidly connected with the tubular protective steering member 3 by a welded connection.
  • a relatively thin metallic plate 12 forming a deformation element 16 is arranged on the web 11 of the member 6 which is secured at the member 6 by spot-welding 13.
  • the U-shaped member 6 includes two elongated apertures 14 and 15 extending in the axial direction of the steering shaft 1 which are preferably arranged parallel to one another. These elongated apertures 14 and 15 are covered off on top by the plate 12.
  • the displacement bolts 7 and 7a extend through the elongated openings 17 arranged in the plate 12 and through the elongated apertures 14 and 15 arranged therebelow and are secured by nuts at the steering bracket 8 under support at an inner surface of the U-shaped member 6.
  • the bolt 7, 7a includes a cup spring 21 (FIG. 5) between its head 20 and the web 11 of the member 6.
  • the areas of the plate 12 of the deformation element 16 arranged correspondingly with the elongated apertures 14 and 15 form slot-like deformation sections 18 and 19.
  • the U-shaped member 6 together with the tubular protective steering member 3 moves in the direction of arrow 23.
  • the material of the plate 12 secured on the U-shaped member 6 is split open within the area of the elongated apertures 14 and 15 by way of the displacement bolts 7 and 7a along the lateral boundaries of the elongated apertures 14 and 15 and is plastically deformed in the direction of arrow 24, as shown more fully in FIG. 6.
  • the illustrated deformation element 16 can also be constructed in such a manner that more than two displacement bolts 7 and 7a are used. It is also feasible that several bolts are provided which are arranged offset to one another in the longitudinal direction.
  • the plate 12 could also have a different thickness over its length for purposes of achieving a differing deformation behavior, respectively, different materials could also be used.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Steering Controls (AREA)
  • Vibration Dampers (AREA)
US07/049,468 1986-05-14 1987-05-14 Steering column fastening arrangement for a motor vehicle Expired - Fee Related US4786076A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863616246 DE3616246A1 (de) 1986-05-14 1986-05-14 Lenksaeulenbefestigung fuer ein kraftfahrzeug
DE3616246 1986-05-14

Publications (1)

Publication Number Publication Date
US4786076A true US4786076A (en) 1988-11-22

Family

ID=6300825

Family Applications (1)

Application Number Title Priority Date Filing Date
US07/049,468 Expired - Fee Related US4786076A (en) 1986-05-14 1987-05-14 Steering column fastening arrangement for a motor vehicle

Country Status (5)

Country Link
US (1) US4786076A (de)
EP (1) EP0245612B1 (de)
JP (1) JPS62268768A (de)
DE (2) DE3616246A1 (de)
ES (1) ES2013736B3 (de)

Cited By (44)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4943028A (en) * 1987-06-19 1990-07-24 Porsche Ag Steering column fastening arrangement for motor vehicles with a deformation element
US4949992A (en) * 1989-09-01 1990-08-21 Ford Motor Company Collapsible steering column
US4951522A (en) * 1989-09-22 1990-08-28 Ford Motor Company Steering column support
US4978138A (en) * 1988-12-16 1990-12-18 Nissan Motor Co., Ltd. Vehicular safety arrangement for driver's seat
US4989898A (en) * 1989-09-07 1991-02-05 Nippon Seiko Kabushiki Kaisha Energy absorption type steering apparatus
US4998999A (en) * 1988-07-25 1991-03-12 Nissan Motor Company, Limited Steering column assembly with energy absorption mechanism
US5024118A (en) * 1990-01-22 1991-06-18 Chrysler Corporation Steering column guide structure
US5052715A (en) * 1990-03-19 1991-10-01 Ford Motor Company Passive impact restraining vehicular steering column assembly
US5074586A (en) * 1988-04-30 1991-12-24 Ford Motor Company Adjustable steering column mounting assembly
US5082311A (en) * 1990-10-01 1992-01-21 Ford Motor Company Passive impact restraining vehicular steering column assembly
US5085467A (en) * 1990-12-19 1992-02-04 Ford Motor Company Energy absorbing support member for a steering column
US5131286A (en) * 1990-05-08 1992-07-21 The Torrington Company Mechanism for absorbing energy transmitted through a vehicle steering column
US5209135A (en) * 1990-04-23 1993-05-11 Nippon Seiko Kabushiki Kaisha Impact absorbing type steering column device
US5251932A (en) * 1990-09-26 1993-10-12 Mazda Motor Corporation Front body structure of automotive vehicle
US5273314A (en) * 1991-10-17 1993-12-28 Toyota Jidosha Kabushiki Kaisha Supporting bracket for knee panel
US5286056A (en) * 1992-06-19 1994-02-15 The Torrington Company Device for absorbing energy transmitted through a vehicle steering column
US5470107A (en) * 1993-07-07 1995-11-28 Etablissement Supervis Energy absorbing steering column mounting
US5606892A (en) * 1995-03-31 1997-03-04 Ford Motor Company Modular steering column assembly
US5775172A (en) * 1995-07-26 1998-07-07 Lemforder Nacam S.A. Guiding and energy absorption device for a motor vehicle steering column
WO1998058831A1 (en) * 1997-06-23 1998-12-30 Volvo Personvagnar Ab Impact-absorbing device for protection of passengers in a vehicle
US6170873B1 (en) 1999-03-29 2001-01-09 Daimlerchrysler Corporation Steering column mounting bracket with pull loops
US6394494B1 (en) * 2000-09-20 2002-05-28 Daimlerchrysler Corporation Steering column having a magnesium upper mounting bracket release break-away bar
US6435555B1 (en) * 2000-02-10 2002-08-20 Delphi Technologies, Inc. Collapsible steering column and method
US6523432B1 (en) * 1999-09-10 2003-02-25 Koyo Seiko Co., Ltd. Shock-absorbing steering assembly
CN1106967C (zh) * 1998-05-22 2003-04-30 克鲁普·普里斯塔公司 用于机动车的转向机构
WO2003066413A1 (en) * 2002-01-04 2003-08-14 Tidamek Ab A device for absorbing kinetic energy
EP1155940A3 (de) * 2000-05-16 2004-01-14 Nsk Ltd Stossabsorbierende Lenkung
US6685225B2 (en) * 2000-09-19 2004-02-03 Nsk Steering Systems Europe Limited Vehicle steering column ride down apparatus
US20040231937A1 (en) * 2003-05-19 2004-11-25 Goodworth Alan Roy Aircraft structural components
US20040245756A1 (en) * 2002-12-13 2004-12-09 Bostic William E. Steering column module
US20060107784A1 (en) * 2003-12-16 2006-05-25 Takata-Petri, Inc. Steering column module
US20070113701A1 (en) * 2005-11-21 2007-05-24 Delphi Technologies, Inc. Energy absorbing apparatus
US7360793B2 (en) * 2004-08-25 2008-04-22 Toyota Jidosha Kabushiki Kaisha Structure for fixing steering column with fastener and disk spring
US20090084925A1 (en) * 2006-12-22 2009-04-02 The Boeing Company Composite leg structure for a lightweight aircraft seat assembly
CN101700785B (zh) * 2009-11-12 2012-10-24 奇瑞汽车股份有限公司 一种车辆转向结构
US8590126B2 (en) 2006-12-22 2013-11-26 The Boeing Company Method of manufacturing a composite leg structure for a lightweight aircraft seat assembly
US20140083234A1 (en) * 2012-09-27 2014-03-27 McLaren Technology Centre Collapsible Steering Column
US20150251684A1 (en) * 2012-09-05 2015-09-10 Kayaba Industry Co., Ltd Steering device
EP2952411A4 (de) * 2013-01-30 2016-03-02 Jtekt Corp Lenksäulenvorrichtung
US9359002B2 (en) 2013-01-30 2016-06-07 Jtekt Corporation Steering-column device
US9381936B2 (en) 2013-01-30 2016-07-05 Jtekt Corporation Steering-column device
US9988070B2 (en) * 2014-02-27 2018-06-05 Kyb Corporation Steering device
US10220871B2 (en) 2013-08-21 2019-03-05 Jtekt Corporation Steering device
WO2020144325A1 (fr) 2019-01-10 2020-07-16 Robert Bosch Automotive Steering Vendôme Sas Dispositif d'absorption d'energie pour une colonne de direction de vehicule automobile et colonne de direction associee

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8711886D0 (en) * 1987-05-20 1987-06-24 Westland Group Plc Joints
US5088768A (en) * 1989-06-27 1992-02-18 Fuji Kiko Company, Limited Structure of impact absorbing steering apparatus
GB2247652B (en) * 1990-09-05 1994-11-09 Rover Group Motor vehicle steering column assemblies
DE4138239A1 (de) * 1991-11-21 1993-05-27 Bayerische Motoren Werke Ag Stossfangeinrichtung, insbesondere an der lenksaeule eines kraftfahrzeugs
FR2708551B1 (fr) * 1993-08-06 1995-10-20 Nacam Colonne de direction à carré renfort à amortissement axial.
US5417452A (en) * 1993-11-01 1995-05-23 Chrysler Corporation Steering column energy absorbing assembly
FR2729198B1 (fr) * 1995-01-06 1997-04-04 Ecia Equip Composants Ind Auto Dispositif de controle du deplacement relatif de deux organes l'un par rapport a l'autre et systeme de fixation d'un equipement de vehicule comportant un tel dispositif
NL1018349C2 (nl) * 2001-06-21 2002-12-30 Alcoa Nederland Bv Energie-absorberend samenstel alsmede voertuig voorzien van een dergelijk samenstel.
GB2469013A (en) * 2008-12-18 2010-09-29 Gm Global Tech Operations Inc Bumper assembly and bumper system for motorized vehicles
ES2391340B1 (es) * 2010-05-11 2013-09-30 Melchor Daumal Castellón Conjunto soporte multifuncion para columna de direccion
DE102010036296A1 (de) 2010-09-03 2012-03-08 Volkswagen Ag Anordnung zur Befestigung einer Lenksäule an einem karosseriefesten Bauteil eines Fahrzeugs

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2225128A1 (de) * 1971-05-25 1972-12-07 Toyota Jidosha Kogyo K.K., Toyota, Aichi (Japan) Stosskraft vernichtende Ausbildung der Lenksäule von Kraftwagen
US4194411A (en) * 1977-04-06 1980-03-25 Koyo Seiko Company Limited Steering column support assembly

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS492728B1 (de) * 1968-12-17 1974-01-22
US4117741A (en) * 1976-12-01 1978-10-03 Honda Giken Kogyo Kabushiki Kaisha Collapsible steering column
GB1584984A (en) * 1977-05-18 1981-02-18 Accles & Pollock Ltd Energy-absorbing steering columns
SE406303B (sv) * 1977-12-12 1979-02-05 Saab Scania Ab Arrangemang vid styrinrettningar i motorfordon

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2225128A1 (de) * 1971-05-25 1972-12-07 Toyota Jidosha Kogyo K.K., Toyota, Aichi (Japan) Stosskraft vernichtende Ausbildung der Lenksäule von Kraftwagen
US4194411A (en) * 1977-04-06 1980-03-25 Koyo Seiko Company Limited Steering column support assembly

Cited By (60)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4943028A (en) * 1987-06-19 1990-07-24 Porsche Ag Steering column fastening arrangement for motor vehicles with a deformation element
US5074586A (en) * 1988-04-30 1991-12-24 Ford Motor Company Adjustable steering column mounting assembly
US4998999A (en) * 1988-07-25 1991-03-12 Nissan Motor Company, Limited Steering column assembly with energy absorption mechanism
US4978138A (en) * 1988-12-16 1990-12-18 Nissan Motor Co., Ltd. Vehicular safety arrangement for driver's seat
US4949992A (en) * 1989-09-01 1990-08-21 Ford Motor Company Collapsible steering column
US4989898A (en) * 1989-09-07 1991-02-05 Nippon Seiko Kabushiki Kaisha Energy absorption type steering apparatus
US4951522A (en) * 1989-09-22 1990-08-28 Ford Motor Company Steering column support
US5024118A (en) * 1990-01-22 1991-06-18 Chrysler Corporation Steering column guide structure
US5052715A (en) * 1990-03-19 1991-10-01 Ford Motor Company Passive impact restraining vehicular steering column assembly
US5209135A (en) * 1990-04-23 1993-05-11 Nippon Seiko Kabushiki Kaisha Impact absorbing type steering column device
US5131286A (en) * 1990-05-08 1992-07-21 The Torrington Company Mechanism for absorbing energy transmitted through a vehicle steering column
US5251932A (en) * 1990-09-26 1993-10-12 Mazda Motor Corporation Front body structure of automotive vehicle
US5082311A (en) * 1990-10-01 1992-01-21 Ford Motor Company Passive impact restraining vehicular steering column assembly
US5085467A (en) * 1990-12-19 1992-02-04 Ford Motor Company Energy absorbing support member for a steering column
US5273314A (en) * 1991-10-17 1993-12-28 Toyota Jidosha Kabushiki Kaisha Supporting bracket for knee panel
US5286056A (en) * 1992-06-19 1994-02-15 The Torrington Company Device for absorbing energy transmitted through a vehicle steering column
US5470107A (en) * 1993-07-07 1995-11-28 Etablissement Supervis Energy absorbing steering column mounting
US5606892A (en) * 1995-03-31 1997-03-04 Ford Motor Company Modular steering column assembly
US5775172A (en) * 1995-07-26 1998-07-07 Lemforder Nacam S.A. Guiding and energy absorption device for a motor vehicle steering column
WO1998058831A1 (en) * 1997-06-23 1998-12-30 Volvo Personvagnar Ab Impact-absorbing device for protection of passengers in a vehicle
US6241284B1 (en) 1997-06-23 2001-06-05 Volvo Personvagnar Ab Impact-absorbing device for protection of passengers in a vehicle
CN1106967C (zh) * 1998-05-22 2003-04-30 克鲁普·普里斯塔公司 用于机动车的转向机构
US6170873B1 (en) 1999-03-29 2001-01-09 Daimlerchrysler Corporation Steering column mounting bracket with pull loops
US6523432B1 (en) * 1999-09-10 2003-02-25 Koyo Seiko Co., Ltd. Shock-absorbing steering assembly
US6435555B1 (en) * 2000-02-10 2002-08-20 Delphi Technologies, Inc. Collapsible steering column and method
US20040145169A1 (en) * 2000-05-16 2004-07-29 Nsk Ltd. Impact absorbing type steering column apparauts
EP1553004A3 (de) * 2000-05-16 2005-07-20 Nsk Ltd Stossabsorbierende Lenkung
EP1155940A3 (de) * 2000-05-16 2004-01-14 Nsk Ltd Stossabsorbierende Lenkung
US7198297B2 (en) 2000-05-16 2007-04-03 Nsk Ltd. Impact absorbing type steering column apparatus
US6726248B2 (en) 2000-05-16 2004-04-27 Nsk Ltd. Impact absorbing type steering column apparatus
US20060163862A1 (en) * 2000-05-16 2006-07-27 Nsk Ltd. Impact absorbing type steering column apparatus
US20040150207A1 (en) * 2000-05-16 2004-08-05 Nsk Ltd. Impact absorbing type steering column apparatus
US7070206B2 (en) 2000-05-16 2006-07-04 Nsk Ltd. Impact absorbing type steering column apparatus
EP1555188A1 (de) * 2000-05-16 2005-07-20 Nsk Ltd Stossabsorbierende Lenkung
US6685225B2 (en) * 2000-09-19 2004-02-03 Nsk Steering Systems Europe Limited Vehicle steering column ride down apparatus
US6394494B1 (en) * 2000-09-20 2002-05-28 Daimlerchrysler Corporation Steering column having a magnesium upper mounting bracket release break-away bar
WO2003066413A1 (en) * 2002-01-04 2003-08-14 Tidamek Ab A device for absorbing kinetic energy
US20040245756A1 (en) * 2002-12-13 2004-12-09 Bostic William E. Steering column module
US7000949B2 (en) 2002-12-13 2006-02-21 Takata-Petri, Inc. Steering column module
US20040231937A1 (en) * 2003-05-19 2004-11-25 Goodworth Alan Roy Aircraft structural components
US20060107784A1 (en) * 2003-12-16 2006-05-25 Takata-Petri, Inc. Steering column module
US7360793B2 (en) * 2004-08-25 2008-04-22 Toyota Jidosha Kabushiki Kaisha Structure for fixing steering column with fastener and disk spring
US20070113701A1 (en) * 2005-11-21 2007-05-24 Delphi Technologies, Inc. Energy absorbing apparatus
US7497470B2 (en) 2005-11-21 2009-03-03 Delphi Technologies, Inc. Energy absorbing apparatus
US20090084925A1 (en) * 2006-12-22 2009-04-02 The Boeing Company Composite leg structure for a lightweight aircraft seat assembly
US8393574B2 (en) * 2006-12-22 2013-03-12 The Boeing Company Composite leg structure for a lightweight aircraft seat assembly
US8590126B2 (en) 2006-12-22 2013-11-26 The Boeing Company Method of manufacturing a composite leg structure for a lightweight aircraft seat assembly
CN101700785B (zh) * 2009-11-12 2012-10-24 奇瑞汽车股份有限公司 一种车辆转向结构
US20150251684A1 (en) * 2012-09-05 2015-09-10 Kayaba Industry Co., Ltd Steering device
US9533699B2 (en) * 2012-09-05 2017-01-03 Kyb Corporation Steering device
US8991865B2 (en) * 2012-09-27 2015-03-31 Mclaren Automotive Limited Collapsible steering column
US20140083234A1 (en) * 2012-09-27 2014-03-27 McLaren Technology Centre Collapsible Steering Column
EP2952411A4 (de) * 2013-01-30 2016-03-02 Jtekt Corp Lenksäulenvorrichtung
US9346482B2 (en) 2013-01-30 2016-05-24 Jtekt Corporation Steering-column device
US9359002B2 (en) 2013-01-30 2016-06-07 Jtekt Corporation Steering-column device
US9381936B2 (en) 2013-01-30 2016-07-05 Jtekt Corporation Steering-column device
US10220871B2 (en) 2013-08-21 2019-03-05 Jtekt Corporation Steering device
US9988070B2 (en) * 2014-02-27 2018-06-05 Kyb Corporation Steering device
WO2020144325A1 (fr) 2019-01-10 2020-07-16 Robert Bosch Automotive Steering Vendôme Sas Dispositif d'absorption d'energie pour une colonne de direction de vehicule automobile et colonne de direction associee
FR3091685A1 (fr) 2019-01-10 2020-07-17 Robert Bosch Automotive Steering Vendôme dispositif d’absorption d’énergie pour une colonne de direction de véhicule automobile et colonne de direction associée

Also Published As

Publication number Publication date
EP0245612B1 (de) 1990-02-07
EP0245612A2 (de) 1987-11-19
ES2013736B3 (es) 1990-06-01
DE3761643D1 (de) 1990-03-15
JPS62268768A (ja) 1987-11-21
DE3616246A1 (de) 1987-11-19
EP0245612A3 (en) 1988-05-11

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Legal Events

Date Code Title Description
AS Assignment

Owner name: DR. ING. H.C.F. PORSCHE AKTIENGESELLSCHAFT, STUTTG

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:WIERSCHEM, FRANZ-RUDOLF;REEL/FRAME:004718/0595

Effective date: 19870428

REMI Maintenance fee reminder mailed
LAPS Lapse for failure to pay maintenance fees
FP Lapsed due to failure to pay maintenance fee

Effective date: 19961127

STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362